/*
 * Copyright 2010 LinkedIn
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package kafka.log

import java.util.concurrent.atomic.AtomicLong

trait LogStatsMBean {
  def getName(): String
  def getSize(): Long
  def getNumberOfSegments: Int
  def getCurrentOffset: Long
  def getNumAppendedMessages: Long
}

class LogStats(val log: Log) extends LogStatsMBean {
  private val numCumulatedMessages = new AtomicLong(0)

  def getName(): String = log.name
  
  def getSize(): Long = log.size
  
  def getNumberOfSegments: Int = log.numberOfSegments
  
  def getCurrentOffset: Long = log.getHighwaterMark
  
  def getNumAppendedMessages: Long = numCumulatedMessages.get

  def recordAppendedMessages(nMessages: Int) = numCumulatedMessages.getAndAdd(nMessages)
}
